The .32 Winchester Self-Loading (WSL) cartridge was designed by Winchester Repeating Arms Company and introduced in 1906. It is a rimless, centerfire rifle cartridge primarily intended for use in semi-automatic rifles, specifically the Winchester Model 1905. The .32 WSL features a bullet diameter of around .321 inches and typically fires a 165-grain bullet at a velocity of approximately 1,390 feet per second, though these specifications can vary slightly depending on the load.
Use cases for the .32 WSL include small to medium game hunting and recreational shooting. Its performance makes it suitable for tasks where moderate power and recoil are considered adequate. Although it was more popular in the early to mid-20th century, the .32 WSL has largely fallen out of favor in modern times and is considered obsolete, with limited availability of factory-made ammunition.
If you're looking to use a rifle chambered in this cartridge today, reloading might be a practical option due to scarce commercial ammunition. Collectors and historical firearms enthusiasts are the primary groups interested in the .32 WSL today.